Revolving ventilator



J. W. TIDWELL.

REVOLVING 'VENT-ILATOR.

APPLICATION FILED JUNE 26, 1919.

1,407, 7 Patented Feb. 21,1922.

2 $HEETSSHEET 1- Tfzl... j

J. W. TIDWELL.

REVOLVING VENTILATOR.

APPLICATION FILED JUNE 25. 1919.-

2 SHEETSSHEET 2.

Patented Feb.

v nairsasrarss eaten retains JOHN w. rrnwntt, or TULSA, OKLAHOMA, ASSIGNOR or oivnrmtr'ro JAMEs r rrz GERALD, OF TULSA, OKLAHOMA.

' REVOLVING v Nrr AToR.

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Application filed June 26, 1919. Serial No. 306,802.

To all whom it may concern: v 7 Be it known that I, JOHN W. TmwnLL, a citizen of the United States, residln g at Tulsa, in the county of Tulsa and State of Oklahoma, have invented certain new and,

useful Improvements in Revolving Ventilators; and I do declare the following to he a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to whichit 'appertains to make and use the same. 7

My invention relates to improvements in ventilators of the type in which the foul air is exhausted through a revolving cowl which is turned by the wind, to effectively equalize the force of the latter to induce the exhaust currents through the device.

One object of the invent-ion is to provide a ventilator of the class described having a novel form of self-lubricating bearing upon which the cowl revolves.

Another object is tov provide a pair of damper plates for closing the ventilator when required, and unique means for mountin said damper plates. p

Yet another object is to utilize part of the bearing supporting means as means for supporting the damper plates. 1

' A still further object is to provide a ventilator whichma-y be easily and inexpensively manufactured, yetone which will be highly efiicient and durable. r i

l Vith the foregoing in view,-the invention resides in v the novel construction and arrangementof parts hereinafter fully de scribed and claimed, the descriptive matter being supplemented by the accompanying drawings which form apart of this application.

Figure l is a side elevation of a. ventilator constructed in accordance with my invention.-

Fig. 2 is avertical section of the ventilator.

Fig. 3 is a vertical section on the plane indicated by the line 33 of Fig. 2. Fig. 4 is a view similar to Fig. 2, but showing the damper plates in open position.

Fig. 5 is a detail horizontal section as indicated by the line 55 of Fig. 2.

Fig. 6 is a perspective view of the exhaust passage and the socket member of the bearing mounted therei bearing.

Specification of Letters Patent. I I atented"1?eb,

straddle the arch of the. roof upon which the ventilator is the cowl 4t with'a weight .1, said socket member being preferab Fig. 8 is a perspective viewof one of the damper plates.

In the drawings above briefly described, the numeral 1 designates an exhaust passage for the foul air orthelike from the building, said passage being connected in any preferred manner with the sage 1 is provided with a flared apron2 having V-shaped notches '8 in its'lower edge to orv other part mounted; suitably shaped cowl dis disposed. at the upper end .of the passage 1 andis mounted n a novel manner to be described, This cowl is provided with'theusual vane 55 for turning it by the action of the wind, and

the outlet end 6 10f said cowl'i's preferably V roof or other suitable part. In the present showing,

the pas provided with a ring? spaced around said end and carried thereby through theinstrumentalityof suitable brackets or the like 8. The ring ,7- is inthe form of a frustum of a hollow cone and'itserves to so direct the 7 wind currents as to most effectively create." suction through the ventilator to exhaustthe preferably provide foul. air, gases, etch, I-

9 disposed opposite the vane 5, toibalance the cowl, thuslinsuring proper turning thereof. This'weight also serves more ordess as a drag to prevent lashing of the .cowl to and fro. The top ofthecowl 4 is provided with an opening 10 and the upper end of a tubular shaft 11" extends through-said opening, being provided with a shoulder such anu t .12.

upon which the cowl top rests and is ,heldby a screw cap. 13 which is threaded on the upper end of theshaft 11, Iabovethe cowl. The shaft 11 formsanoil reservoir and may be filled'by removing the cap 13..-' $'ThB;-' IOWer end of the shaft is closed by a screw cap 14 and said shaft is'provided with one or more oil discharge openings -15.-- shaft 11 with respect to the cowl 4, a channel bar or other suitable means 16' is employed.

The lower portion of the shaft 11 is loosely F or bracing the received in a tubular socketmember 17 which is fixedly mounted within the passag formed of a single piece of piping closed at its lower end by a screw cap 18 while its upper end is provided, with a reducer 19 ter. Oil is sup which prevents the entrance of foreign matlied-to the socket member 17 from the tubuar Sh ft 11 "and'inthe pre ent showing, the oil enters said socket member through the openings in the shaft.

. A ball bearing is preferably interposed between the two caps 1d and 18 to antifrictionally support the shaft 11, and two or more floating rings 21 loosely surround the shaft within the upper and lower ends of the socket member 17. The upper ring 21 is mounted loosel between circumferential ribs 22 on the shaft, while the lower ring 21. may be held against upward movement by a rib 23 and againstadownward movement by the cap let. These floating rings retain the shaft ll properly centered in the bearing member 17 and it will of course be understood that they could be mounted in any suitable manner. Since the socket member is filled with oil from the shaft 11, the latter and the cowl will re volve with practically no resistance and the device will thereby be extremely sensitive.

For mounting the. socket member 17 I provide bar means extending across the passage 1, said bar means being shown as conisting of upper and lower channel bars 24 and 25, the fianges'26 of the latter being directed upwardly for a purpose to appear. The socket member 17 passes through and is secured in openings formed. in the bars 24 and 25 and is rigidly held in vertical position by said bars. In thepresent showingjI have utilized the flanges 26 for supporting a pair of damper plates 27, said plates being disposed in the passage 1 with their inner edges resting on said flanges 26. The plates 27 are provided with vertical shoulders 28 engaging the outer sides of the flanges 26, said shoulders 28 and the inner edge portions of the damper plates forming right angular seats which pivotally mount the plates on the bar 25. It will of course be understood that these seats may vary and that the bar means supporting them need not necessarily be formed by one bar such as 25.

Although any adquate means could be provided for operating the damper plates 27, each of said plates preferably provided with an arm 29 secured to its lower side and extending beyond its pivotal axis, the'free ends of the two arms being conunit-317s reliable for exhausting the foul air and gases, easy operation being insured at all times by the self-lubricating bearing. Whenever required, the ventilator may be closed by the plates 27. In addition to these advantages, the entire device may be easily and inexpensively manufactured and marketed at small cost.

Since probably the best results are obtained from the details disclosed, they may well be followed, but within the scope of the lIlVBIltlOIl. as claimed,'numerous minor changes may well be made.

l'claim:

1. In a ventilator, an exhaust passage, a cowl at the upper end of said passage, a tubular shaft depending from said cowl and forming an oil reservoir, a Xed tubular socket member in which said shaft is received'and intowhich it discharges oil, a ball in said socket, on which said shaft rests, spaced circumferential shoulders on said shaft, and floating rings surrounding said shaft between said shoulders.

2. In a cowl bearing, the combination with a fixed vertical socket and a thrust bearing within its lower end, of a cowl supporting shaft extending into said socket, a ring loosely surrounding said shaft and in running contact with the wall of the socket, a shoulder on said shaft contacting with the upper side of said ring, and a cap threaded on the lower end of said shaft, said cap serving to retain said ring against said shoulder and acting also as a thrust surface resting on said thrust bearing.

in testimony whereof I have hereunto set my hand. JOHN W. TIDWELL. 

